# Various utility function for the evolve extension

#

# Copyright 2017 Pierre-Yves David <pierre-yves.david@ens-lyon.org>

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

from mercurial.node import nullrev

shorttemplate = "[{label('evolve.rev', rev)}] {desc|firstline}\n"

def obsexcmsg(ui, message, important=False):

    verbose = ui.configbool('experimental', 'verbose-obsolescence-exchange',

                            False)

    if verbose:

        message = 'OBSEXC: ' + message

    if important or verbose:

        ui.status(message)

def obsexcprg(ui, *args, **kwargs):

    topic = 'obsmarkers exchange'

    if ui.configbool('experimental', 'verbose-obsolescence-exchange', False):

        topic = 'OBSEXC'

    ui.progress(topic, *args, **kwargs)

def filterparents(parents):

    """filter nullrev parents

    (and other crazyness)"""

    p1, p2 = parents

    if p1 == nullrev and p2 == nullrev:

        return ()

    elif p1 != nullrev and (p2 == nullrev or p1 == p2):

        return (p1,)

    elif p1 == nullrev and p2 != nullrev:

        return (p2,)

    else:

        return parents

    configbool = repo.ui.configbool

    if not configbool('experimental', 'obshashrange', False):

        return False

    if not configbool('experimental', 'obshashrange.warm-cache', True):

        return False

    maxrevs = repo.ui.configint('experimental', 'obshashrange.max-revs', None)

    if maxrevs is not None and maxrevs < len(repo.unfiltered()):

        return False

    return True